gearing

[DeadlyStryker]

how do you count gears and stuff...i just saw a post that said 'did a ride in 32/20 what gear is that? i cruise around in 2nd chainring front and 4th chainring back around my house and jump curbs and stuff and do wheelies \/

 

[Evel Knievel]

how do you count gears and stuff...i just saw a post that said 'did a ride in 32/20 what gear is that? i cruise around in 2nd chainring front and 4th chainring back around my house and jump curbs and stuff and do wheelies  \/

Single speed bikers don't have shifters and multiple gears. They talk about gear ratios. A gear ratio of 2:1 is the holy grail of SS MTB'rs. In the hilly area we are at a 2:1 is very difficult to pedal up hill. So we are discussing the number of teeth on the chainring/cog (32/20). The ratio would be something like a 1.6:1. You would need to be a mathmetician to figure it all out. 32 tooth chainring divided by the 20 tooth cog = 1.6 .

An example of how a 2:1 is derrived . Things like chainstay length, chainlength and tire diameter have a small affect but we will simplify it down to teeth on the chainring/cog. The "2" is two complete revolutions of the rear wheel : to 1 complete revolution of the crank.

Evel

 

[chumbaracing]

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superb explanation..